Cast volume icon appears in volume slider when playing music through Poweramp

[sk8223]

1. Poweramp build number (available in Poweramp Settings / About): build-905-arm64-play [905004-96b6d050]
2. Your device model: Google Pixel 4a
3. Your Android version: Android 11
4. Your custom ROM name/version (if you're on custom ROM): Issue occurs on stock OS (Pixel, Android 11) and LineageOS 18

Steps to reproduce:

1. Open Poweramp and play any song
2. Use hardware volume buttons to change volume

Expected: Media volume icon will appear (music note) in volume slider

Actual: Cast volume icon appears (cast icon) in volume slider

NOTE: In Settings > Audio > Output, the output engine I have selected is AAudio. I have tested the other output options as well, and all of them cause the system to detect the volume being output from Poweramp as a cast device when nothing is being cast in the background. I don't use casting at all.

Please see this video example: https://streamable.com/1v1xf7

[John Titor]

It's happening because you are using custom volume levels, just switch to system default option.